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Science And Technology Solutions Solutions for Class 9 Science Chapter 6 Classification Of Plants are provided here with simple step-by-step explanations. These solutions for Classification Of Plants are extremely popular among class 9 students for Science Classification Of Plants Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Science And Technology Solutions Book of class 9 Science Chapter 6 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Science And Technology Solutions Solutions. All Science And Technology Solutions Solutions for class 9 Science are prepared by experts and are 100% accurate.

Page No 80:

Question 1:

Match the proper terms from columns A and C with the description in column B.

   'A'   'B'                  'C'
   Thallophyta   Seeds are formed in fruits  Fern
   Bryophyta   No natural covering on seeds  Cycas
   Pteridophyta   These plants mainly grow in water  Tamarind
   Gymnosperms   These plants need water for reproduction   Moss
   Angiosperms   Tissues are present for conduction of water and food   Algae
 

Answer:


​

 
 'A'
 		   'B'    'C'
 
 Thallophyta
 		  These plants mainly grow in water   Algae
   
Bryophyta
 		  
 These plants need water for reproduction
 		 Moss 
   Pteridophyta  
 Tissues are present for conduction of water and food
 		   Fern
 
 Gymnosperms
 		    No natural covering on seeds   Cycas
   
Angiosperms
 		    Seeds are formed in fruits   Tamarind
 
 

Page No 80:

Question 2:

Complete the sentences by filling in the blanks and explain those statements.
(angiosperms, gymnosperms, spore, bryophyta, thallophyta, zygote)

a. .................... plants have soft and fibre-like body.
b. .................... is called the ‘amphibian’ of the plant kingdom.
c. In pteridophytes, asexual reproduction occurs by .................... formation and sexual reproduction occurs by ....................formation.
d. Male and female flowers of ....................are borne on different sporophylls of the same plant.

Answer:

a. Thallophyta plants have soft and fibre-like body.
b. Bryophyte is called the ‘amphibian’ of the plant kingdom.
c. In pteridophytes, asexual reproduction occurs by spore formation and sexual reproduction occurs by zygote formation.
d. Male and female flowers of gymnosperms are borne on different sporophylls of the same plant.

Page No 80:

Question 3:

Answer the following questions in your own words.

a. Write the charateristics of subkingdom Phanerogams.
b. Distinguish between monocots and dicots.
c. Write a paragraph in your own words about the ornamental plants called ferns.
d. Sketch, label and describe the Spirogyra.
e. Write the characteristics of the plants belonging to division Bryophyta.

 

Answer:

a. The word ‘Phanerogamae’ comprises the words ‘phaneros’ meaning ‘visible’ and ‘gamos’ implying ‘reproduction’. They show characteristics like-
  • well-differentiated and visible reproductive tissues that ultimately make seeds.
  • seeds consists of the embryo along with stored food which helps in the initial growth of the embryo during germination
Phanerogams are further subdivided into gymnosperms and angiosperms on the basis of seeds which are enclosed in a fruit or not. Gymnosperms produce seeds which are not enclosed by fruit and hence are called naked seeds whereas angiosperms produce seeds which are enclosed in fruits.


b. 

Monocots

Dicots

The embryo in a monocot seed has one cotyledon.
The embryo in a dicot seed has two cotyledons.

The sepals or petals are in multiples of three.
The sepals or petals are in multiples of four or five.

The stem vascular bundles are scattered.
The stem vascular bundles are arranged in a ring.

The leaves have parallel venation.
The leaves have reticulate venation.

They have fibrous or adventitious roots.
They have a tap-root system.
 


c. Ferns belong to the division pteridophyta. The plant body of a pteridophyte is differentiated into root, stem and leaves. They are found in cool, damp and shady places and have specialized tissues for the conduction of water and food. Ferns are economically important plants as they are used for ornamental purposes. Some of the ornamental ferns are the sword fern- Nephrolepis, the holly fern - Cyrtomium, the leatherleaf fern - Rumohra. 

d. Spirogyra is a type of green algae which belongs to the division Thallophyta. It does not have specific parts like leaves, stems etc. It contains chlorophyll and is thus autotrophic in nature. It contains spiral chloroplasts and thin unbranched chains of cylindrical cells. 



e. The characteristics of bryophytes are- 
  • They are the first plants to live on land, but require moist conditions to survive. For this reason they are called ‘the amphibians of plant kingdom’.
  • They are non-vascular, i.e., they do not have specialized vascular tissues (xylem and phloem) for the conduction of water and food.
  • They lack true roots, stem and leaves. But, they show more body differentiation than thallophytes.
  • They have rhizoids instead of true roots.
  • They do not bear flowers and seeds.
  • They reproduce both sexually as well as asexually.
  • Bryophytes exhibits 'alternation of generations' in which gametophytic phase (haploid) alternates with sporophytic phase (diploid).
  • Examples of bryophytes: Riccia, Marchantia, Funaria

Page No 80:

Question 4:

Sketch and label the figures of the following plants and explain them into brief.

Marchantia, Funaria, Fern, Spirogyra.

Answer:

 a. Marchantia

​ 

b. Funaria



c. Fern



d. Spirogyra



 

Page No 80:

Question 5:

Collect a monocot and dicot plant available in your area. Observe the plants carefully and describe them in scientific language.

Answer:

It is an acitvity based question. Kindly do it yourself.

Page No 80:

Question 6:

Which criteria are used for the classification of plants? Explain with reasons.

Answer:

Plants are divided on the basis of various characteristics like:

  • Differentiation of plant body into roots, stem and leaves
  • Vascular tissues
  • Production of seeds
  • Covering of seeds
  • Number of cotyledons in a seed
The following chart explains the classification of plants:



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